| ID | 63482 |
| フルテキストURL | |
| 著者 |
Hiranaka, Takaaki
Department of Orthopaedic Surgery, Okayama University Hospital
Miyazawa, Shinichi
Department of Orthopaedic Surgery, Okayama University Hospital
ORCID
Kintaka, Keisuke
Department of Orthopaedic Surgery, Okayama University Hospital
Higashihara, Naohiro
Department of Orthopaedic Surgery, Okayama University Hospital
Tamura, Masanori
Department of Orthopaedic Surgery, Okayama University Hospital
Zhang, Ximing
Department of Orthopaedic Surgery, Okayama University Hospital
Xue, Haowei
Department of Orthopaedic Surgery, Okayama University Hospital
Ozaki, Toshifumi
Department of Orthopaedic Surgery, Okayama University Hospital
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| 抄録 | Purpose
This study aimed to evaluate changes in the cleft width, defined as the distance between the lateral edge of the medial tibial plateau and that of the medial meniscus (MM) posterior root, using open magnetic resonance imaging (MRI) in patients with MM posterior root tear (MMPRT). Methods This study included 25 patients (20 women and 5 men; mean age: 65.2 years) who were diagnosed with MMPRT and underwent pullout repair. Upon coronal imaging, the cleft width was evaluated at the 10° and 90° flexed knee positions. The difference in the cleft width (defined as the cleft width at 90° minus the cleft width at 10°) was also calculated. Upon sagittal imaging, the MM posterior extrusion (MMPE) at 90° was also evaluated. Separate univariate linear regression models were used to determine the association between the time from injury to MRI and radiographic measurements. Results The mean cleft width at 10° and 90° was 4.9 ± 2.6 mm and 7.4 ± 3.7 mm, respectively; the mean difference in cleft width was 2.5 ± 1.5 mm, and the mean MMPE at 90° was 3.7 ± 1.3 mm. There was a significant difference in cleft width at 10° and 90° (p < 0.001). The time from injury to MRI was significantly associated with the cleft width at 10° (R = 0.42; p = 0.023), cleft width at 90° (R = 0.59; p = 0.002), the difference in the cleft width (R = 0.62; p = 0.008), and MMPE at 90° (R = 0.53; p = 0.008). Conclusion This study demonstrates that the cleft width is significantly larger during knee flexion than during knee extension. Increased cleft width during knee flexion (“graben” sign) may help diagnose MMPRT, especially in cases where the cleft sign is unclear during knee extension. |
| キーワード | Medial meniscus
Posterior root tear
Magnetic resonance imaging
Extrusion
Cleft sign
Graben sign
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| 備考 | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00167-022-06983-8
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| 発行日 | 2022-05-04
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| 出版物タイトル |
Knee Surgery, Sports Traumatology, Arthroscopy
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| 巻 | 30巻
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| 号 | 11号
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| 出版者 | Springer Science and Business Media LLC
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| 開始ページ | 3726
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| 終了ページ | 3732
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| ISSN | 0942-2056
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| 資料タイプ |
学術雑誌論文
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| 言語 |
英語
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| OAI-PMH Set |
岡山大学
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| 著作権者 | © The Author(s) under exclusive licence to European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2022
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| 論文のバージョン | author
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| PubMed ID | |
| DOI | |
| Web of Science KeyUT | |
| 関連URL | isVersionOf https://doi.org/10.1007/s00167-022-06983-8
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| Citation | Hiranaka, T., Furumatsu, T., Miyazawa, S. et al. Increased cleft width during knee flexion is useful for the diagnosis of medial meniscus posterior root tears. Knee Surg Sports Traumatol Arthrosc 30, 3726–3732 (2022). https://doi.org/10.1007/s00167-022-06983-8
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